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公开(公告)号：US20200303776A1
公开(公告)日：2020-09-24
申请号：US16085772
申请日：2017-02-23
发明人： Kenji WATANABE
IPC分类号： H01M10/0568 , H01M10/0525 , H01M4/525 , H01M4/505 , H01M4/04 , H01M10/0569
摘要： A non-aqueous electrolytic solution secondary battery including a positive electrode including a positive electrode active material capable of intercalating and deintercalating a lithium ion; a negative electrode including a negative electrode active material capable of intercalating and deintercalating a lithium ion; a non-aqueous electrolytic solution containing a lithium ion; and an outer package, wherein the positive electrode active material includes a lithium-containing composite oxide having a layered rock salt structure and represented by the following composition formula: LiNixCoyMnzO2, provided that 0.7≤x≤0.9, 0.05≤y≤0.2, 0.05≤z≤0.15, and x+y+z=1 are satisfied, and the battery is formed by using the non-aqueous electrolytic solution containing methylene methanedisulfonate and having a content thereof of 2.0% by mass or more and 5.0% by mass or less based on a solvent.
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2.发明申请公开(公告)号：US20200295345A1
公开(公告)日：2020-09-17
申请号：US16083926
申请日：2016-12-26
发明人： Masanori HIRAI , Kenji SATO
IPC分类号： H01M4/04 , H01G11/86 , H01M10/0585
摘要： A method of manufacturing electrodes for an electrochemical device in which each of electrodes comprises a current collector 9, 11 and active material layers 10, 12 using four die heads 15a-15d is described. The active material layers 10, 12 each contains a lower active material layer 10a, 12a and an upper active material layer 10b, 12b. While the current collector 9, 11 is being conveyed, a slurry is ejected from the die head 15a that is on the most upstream side in the direction of conveyance S and the die head 15b located on the second from the upstream side to form the lower active material layers 10a, 12a of two electrodes, and a slurry is ejected from the die head 15c located on the third from the upstream side and the die head 15d located on the fourth from the upstream side to form the upper active material layers 10b, 12b of two electrodes.
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公开(公告)号：US10746711B2
公开(公告)日：2020-08-18
申请号：US15735397
申请日：2016-06-01
IPC分类号： G01N1/22 , G01N25/56 , G01N31/16 , H01M4/139 , G01N27/416 , H01M4/1391 , H01M4/525 , H01M10/0525 , H01M10/058 , H01M10/052 , H01M4/02
摘要： A method of measuring a quantity of moisture in an electrode includes at least three steps as follows: disposing an electrode, which is a measurement target sample, inside a container provided with a gas introduction pipe and a gas discharge pipe; heating the electrode by supplying inert gas heated to a predetermined temperature in advance to the inside of the container through the gas introduction pipe, and vaporizing moisture adsorbed to the electrode; and collecting the moisture vaporized from the electrode, together with the inert gas through the gas discharge pipe and determining the quantity of the collected moisture. In addition, a moisture quantity measuring apparatus includes a container that has a gas introduction pipe and a gas discharge pipe, a heating unit, and a moisture quantity measuring unit that collects moisture vaporized from a sample, through the gas discharge pipe and determines the quantity of collected moisture.
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4.发明申请公开(公告)号：US20200220171A1
公开(公告)日：2020-07-09
申请号：US15751187
申请日：2016-09-21
发明人： Ai FUJISAWA
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/62
摘要： There is provided a positive electrode for a lithium ion secondary battery, comprising a current collector and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer comprises a positive electrode active material, a conductive auxiliary agent and a binder; a porosity of the positive electrode active material layer is 20% or lower; the positive electrode active material comprises a lithium composite oxide, and a BET specific surface area of the positive electrode active material is 0.1 to 1 m2/g; at least a part of the conductive auxiliary agent comprises spherical amorphous carbon particles; and a content of the conductive auxiliary agent is 1.8 to 6% by mass with respect to the positive electrode active material.
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公开(公告)号：US20190273246A1
公开(公告)日：2019-09-05
申请号：US16319895
申请日：2017-06-23
发明人： Yasutaka KONO
IPC分类号： H01M4/133 , H01M4/62 , H01M10/0525 , H01M10/0569 , H01M4/587
摘要： An electrode for a lithium-ion battery (100) of the present invention is a high-density electrode for a lithium-ion battery (100) including a collector layer (101), and a negative electrode active material layer (103) which is provided on at least one surface of the collector layer (101) and includes a negative electrode active material, a water-based binder resin, a thickener, and a conductive auxiliary agent, in which a density of the negative electrode active material layer (103) is equal to or more than 1.55 g/cm3, and an electrolytic solution soaking time into an electrode, which is measured using the following method 1, is equal to or longer than 10 seconds and equal to or shorter than 55 seconds.(Method 1: In a temperature environment of 25° C., 5 μL of an electrolytic solution obtained by dissolving LiPF6 as an electrolyte in a solvent mixture of ethylene carbonate and diethyl carbonate (a volume ratio between ethylene carbonate and diethyl carbonate is 3:7) so as to obtain a concentration of 1.0 mol/L is added dropwise to a surface opposite to a collector layer (101) side of the negative electrode active material layer (103) of the electrode for a lithium-ion battery (100) from a location 0.5 cm away from the surface of the negative electrode active material layer (103) in a vertical direction. Next, a time taken for a liquid droplet of the electrolytic solution to become unobservable from the surface of the negative electrode active material layer (103) from the dropwise addition of the electrolytic solution is measured, and the time is considered as the electrolytic solution soaking time into the electrode.)
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公开(公告)号：US20190237746A1
公开(公告)日：2019-08-01
申请号：US16380292
申请日：2019-04-10
发明人： Tetsuya SATO
IPC分类号： H01M4/04 , H01M10/0585 , H01M4/139 , H01M4/64 , H01M4/13
CPC分类号： H01M4/0404 , H01M4/13 , H01M4/139 , H01M4/64 , H01M10/0525 , H01M10/0585 , H01M2220/30
摘要： An object of the present invention is to provide a high-quality secondary battery having high electric characteristics and high reliability, the secondary battery preventing a shortcut between a positive electrode and a negative electrode by means of an insulating material and preventing or reducing an increase in volume and deformation of a battery electrode assembly, and a method for manufacturing the same. Secondary battery 100 according to the present invention includes a battery electrode assembly including positive electrode 1 and negative electrode 6 alternately stacked via separator 20. Positive electrode 1 and negative electrode 2 each includes current collector 3 or 8 and active material 2 or 7 applied to current collector 3 or 8. Active material 2A positioned on one surface of positive electrode 1 of current collector 3 includes flat portion 2A1 and small-thickness portion (thin-layer portion) 2A3 positioned on the end portion side relative to flat portion 2A1, the small-thickness portion 2A3 having a thickness that is smaller than that of flat portion 2A1. A portion of active material 2B positioned on another surface of current collector 3 of positive electrode 1, the portion facing thin-layer portion 2A3 of active material 2A positioned on the one surface via current collector 3 is a flat portion having a constant thickness.
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公开(公告)号：US10305108B2
公开(公告)日：2019-05-28
申请号：US15300630
申请日：2015-03-30
发明人： Shin Tanaka
摘要： A graphite-based active material including: a first composite particle including a first graphite core particle and a first non-graphite-based carbon material covering the surface of the first graphite core particle; and a second composite particle including a second graphite core particle and a second non-graphite-based carbon material covering the surface of the second graphite core particle, wherein the mass fraction of the second non-graphite-based carbon material in the second composite particle, mass fraction B, is 5% by mass or more and more than the mass fraction of the first non-graphite-based carbon material in the first composite particle, mass fraction A, and the proportion of the second composite particle to the total of the first composite particle and the second composite particle is 1% by mass or more.
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公开(公告)号：US10290839B2
公开(公告)日：2019-05-14
申请号：US15305688
申请日：2015-03-10
发明人： Akihiro Modeki
摘要： Secondary battery 100 comprises: battery electrode assembly (electrode laminate) 4 that includes positive electrodes 1 and negative electrodes 2 that overlap each other with separator 3 interposed therebetween; and conductive adhesive tape 5 which has a multilayer structure including adhesive layer 5a and conductive layer 5b, wherein adhesive layer 5a has conductivity and adhesiveness and adheres to a surface of battery electrode assembly 4, conductive layer 5b is laminated on adhesive layer 5a, and conductive adhesive tape 5 has electric resistance of 1.0 Ω/cm2 or less in a thickness direction and covers at least a part of an outer peripheral portion of battery electrode assembly 4 by being wound around said part.
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公开(公告)号：US20190051891A1
公开(公告)日：2019-02-14
申请号：US16083756
申请日：2016-12-09
发明人： Masaaki MATSUU , Ai FUJISAWA
IPC分类号： H01M4/36 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/0525 , H01M10/058 , H01M10/44 , H01M4/04
摘要： Provided is a positive electrode mixture for a secondary battery, the positive electrode mixture allowing provision of a secondary battery that exhibits a high capacity maintenance rate in a charge-discharge cycle. The positive electrode mixture for a secondary battery comprises a positive electrode active material, a binder, and an organic acid, wherein the positive electrode active material comprises a lithium nickel complex oxide having a layered crystal structure, the binder comprises a vinylidene fluoride-based polymer, and when a solution prepared by suspending the positive electrode active material in pure water has a pH of A, and the content of the organic acid per 100 parts by mass of the positive electrode active material is B parts by mass, A and B satisfy the following expression (1). 30×B+5≤A≤30×B+10 (1)
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10.发明申请公开(公告)号：US20190020057A1
公开(公告)日：2019-01-17
申请号：US16081510
申请日：2017-01-06
发明人： Ai FUJISAWA
IPC分类号： H01M10/0525 , H01M10/0566 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66
摘要： A positive electrode for a lithium-ion secondary battery of the present invention includes a collector for a positive electrode and a positive electrode active material layer provided on the collector for a positive electrode. The positive electrode active material layer includes a positive electrode active material, a conductive auxiliary agent, and a binder, the conductive auxiliary agent includes flake-shaped graphite having an average thickness of 0.5 μm or less, and, when an average particle diameter of the positive electrode active material is represented by D50, the average particle diameter of the flake-shaped graphite is equal to or more than (3× active material D50/5) and equal to or less than (9× active material D50/10).
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